I have a 2005 f-350 crew cab long bed 4x4,
only performance mods are a
zoo dad, afi intake & filter, cat & muffler delete,
has a 140,000 miles on it,
i change oil every 4000 miles with Mobil 1 fully synthetic & fuel filters same time,
always put 2 stroke (1 oz to every gallon of fuel) in my fuel,
done all this since day 1 & NEVER had a prob except injector (number 4) go out. (KNOCK ON WOOD). lol
question is now i noticed it has got ALOTT louder (the dieseling) twice as loud as it use to be.
still runs like new & gets 18 mpg.
why do u think its noiser now ?????
thanks for your two cents & time